Updated to Catalina from Mojave with disappointing results. Install broke more than I expected — things that have worked since El Capitan:
Audio — fixed with updated kexts and permissions
Sleep/Wake — system wakes, but no mouse/keyboard after wake; disabled sleep
Purple lines went away (RX 470)…I suppose that’s something
Worse, Catalina itself seems to have broken things that used to work fine:
Time Machine lost its entire backup history (and again following 10.15.0 Update) — no idea if it’s recoverable
iTunes/whatever no longer finds music files on network drives (finds the server, sees the albums, but “No Items”, spinning wheel of death, force quit)
DVDPlayer crashes on start (same with Mojave)
I had hoped the 10.15.0 Update would address these, but it hasn’t. Otherwise, I suppose the update went OK....
— Doug